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F. B. DUNN.

PAVING BRICK.

Jan. 19, 1932.

Original Filed May 2, 1919 -ET' or Reissued Jan. 19, 1 932 f j UNITED STATES.

PATENT: 1; OFFICE ram 3. nm, or common onro, nssrcxon. T0 'rnn numrwmn-c -r LUG nnrcx t I comm, or comvmur. 01110, A. coarom'rron or omo ravine BRICK Original No. 1,387,605, dated November 22, 1921, Serial No. 284,226, medley 2, 1919. Application for reissue filed April 10, 1981. Serial No, 529,261.

My invention relates to paving brick, and

particularly to that type thereof known to.

the brick industry as wire-cut brick.

The objects of my invention are to provide.

a side surface of preferably a wirecut brick with a plurality of {spacing studs, lugs or projections of uniform dimensions'adapted to space the bricks uniformly apart when laid' in a pavement, and preferably with depres-' sions adjacent to said studs adapted to receive said projecting studs when two bricks are reversely placed together, thus allowing the flat surface of adjoining bricks to contact when stacked for drying and burning during manufacture, to prevent the crushing of said studs and destroying their uniformity, and preventing the bending of the bricks during manufacture; said grooves alsofacilitating the'flow of binder material between the bricks when laid in a pavement. v

The features of my invention are herein-, afterfully described and pointed out and are illustrated in the accompanying drawings inwhich: Figure 1 is a perspective view of a wirecut pavingbrick embodying my invention.

Figure 2 is a plan view of the same as laid in a pavement. V,

-formed surfaces D, I mold projecting spacing studs d of uniform height-adapte maintain uniform spaces between the courses of bricks when laid in a Y avement. These projections or spacing stu s I being formed on the brick while the same is in plastic condition, it is necessary to provide means to protect said projecting studs when said bricks are stacked for drying or burning, as

"illustrated inFig. 3, so that'they will not become distorted and their uniformity of height destro ed. For this purpose I provide, adjacen to the projecting studs (1, de-

pression E of suflicientdepth and width to receive the projecting studs of an ad acent brick therein, when thebricks are stacked for drying or burning, as shown in- Fig. '3; and

also permits the Hat surfaces of the brick at each side of said depressions E to contact when stackedfor. drying and burning, thereby preventing the brick from becoming bent or otherwise distorted during the process of drying and burning. l

- From the foregoing description taken in conjunction with the .drawings, it will be noted that each brick is provided with coacting sets of studs and "depressions and that the studs and depressions are so positioned with relation to each other that the studs of width of the grooves and the grooves of one set being located between the adjacent lugs and the end of the brick while the lugs of the. other set are located between the groove and the end of the brick. It is important that the height of the studs dbe less than the depth of the depressions B so that the studs *one brick will register in the depressions of anotherbrick when'freversely placed there will clear the walls of the depressions and tact with each other over all of the flat'portions. Each brick will thus be in contact with its opposed brick over relatively large flat surfaces, the upper brick will be well suprted against sagging and both. bricks will Bee-protected against injury to either the lugs or grooves. In fact it is preferred to have plenty of clearance-between the lligs and rooves so thatthe staeking operation may e'carried on rapidl without wasting time in determining whet er or not the studs are in exact registration with the depressions. As

the grooves or depressions extend the full width of the brick, the lugs and grooves will register at any point along said width when two bricks are nested in reverse order, which features further facilitates the stackingop;

. the opposed surfaces of two nested bricks consions are formed on the safe surface of each,

brick simplifies their formation. This surface, as shown, is the uncut surface, and it is of particular advantage in drying that'the "bricksbe stacked or nested with their cut surfaces exposed, in view of the fact that moisture escapes or asses more readily from the brick through t e wire-cut surface than the surfaces which contact with and are smoothed by the die, as this smoothing and pressing action closes the pores or reduces the porosity of said surfaces,as is well understood.

Another feature of advantage in stacking resides in the feature of so locating the (:0- operating grooves and lugs that when the bricks are stacked inreverse order, the ends brick provided with three smooth of the bricks will automatically lie in the same vertical plane or will have cflush ends, thus ensuring orderly stacking and maximum and uniform capacitgliii loading.

Having thus described my invention so as to enable others to utilize the same, what I claim as new and desire to secure by Letters Patent is 1. As an article of manufacture, an unpressed paving brick cut from a continuous column of clay having two transverse grooves in, one of the die-formed surfaces thereof, and erimetrical studs projectin from the sur ace of said die-formed su ace 'adjacent to the same relative side of each of said transverse grooves, substantially as set forth.

' 2. As an article of manufacture, a paving brick having two transverse grooves in one of the surfaces thereof, and spaced alined perim'etrical studs projecting from the same surface adjacent the same relative side of each of said ooves, the said studs being of less height t an the depth of said groovesjand registering therewith when one brick is replaced upon another, as and for thepurposes specified.

versely 3. As an article of manufacture, a paving un roken side surfaces, the remaining side surface being formed with setsof transverse grooves,

' V and width than the dep brick is reve for the purposes-specified.

4. As an article of manufacture and perimetrical studs adjacent the same relative side of each of said grooves, said studs being spaced apart in transverse alinement and of less height than the de thof .said grooves and re rin 4 y place upon another, as and brick havin on one face thereof a transverse groove ocated nearone endof the brick and a stud adjacent said gfoove of less height t and width of the groove, and another similar grooveand stud near the other end of thebrick located in retherewit when one,

a paving? 7. As an article of manufacture, a wire-cut paving brick having located on one of the uncut surfaces thereof at least two transverse grooves and transversely aligned studs adj acent the same relative "side of each of said grooves and of less height and width than the depth and width of the grooves, said studs of one brick registering with the grooves of another .brick when one brick is reversely placed upon another.

8. As an article of manufacture, a paving brick having on one face thereof at least two transverse grooves and transversel aligned studs adjacent the samefrelative si e of each of said grooves and of less height and width than the depth and width of they grooves bein of equal depth the the face of 5m buck.

9. As an article of manufacture, a paving brick having on one face thereof at least two transverse grooves extendin the full width of said face and transverse y aligned studs on the same relative side of each of said grooves and of less heightand width than the depth and. width of the grooves, said grooves and studs being so located with respect to one another that a plurality of bricks when stacked in alternately reverse order will automatically assume -a""position in which the ends of the bricks lie in substantially the same vertical plane. 7 l

' FRANK B. DUNN.

verse order with respect'to said'first-named I groove and stud.

. 5. As an article of manufacture, it pa g," I

brick having on one of its face: near one -of the brick a transverse-groove and trans- Y versely alined s =eced studs-ad acent the groove of less heig t and width than the depth and width of the groove, and another similar groove. and. alined spacedstuds' near the other I brick in reverse order I ooves, said a 11 width of 

